A soil profile consists of sand (7-m thick) which overlies a layer of clay (9-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer? For sand layer: Void Ratio = 0.71, Specific gravity = 2.64, Degree of Saturation = 0.76 For clay layer: Void Ratio = 0.9, Specific gravity = 2.79 Round off to two decimal places.

The coefficient of earth pressure at rest for a sand having the Poisson's ratio value of 0.25 is. ?

The water table in a deposit of uniform sand is located at 2m below the ground level. Assuming the soil above the water table be dry N and the void ratio is 0.75. The effective stress (in k- rounded off to nearest integer) at a depth of 5m below the ground level is N =9.81k-2 Take G = 2.65 and yw W m m 2'